What is the primary purpose of blow-drying hair?

The primary purpose of blow-drying hair is to style and shape hair while drying it. This process involves using a blow dryer to not only dry wet hair but also to manipulate its structure, allowing for various styling techniques. Blow-drying enables hairdressers to create volume, smoothness, or curls depending on the desired look.

While removing excess water from hair is an important aspect of the drying process, the styling and shaping component is essential for achieving a polished finish. Preparing hair for color treatments and making hair more manageable are benefits that can result from blow-drying, but they are secondary to the primary goal of using heat and airflow to shape and style hair. This focus on aesthetics during blow-drying is why option B is the most accurate representation of its primary purpose.